Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 33, Issue 6, Pages 2786-2793Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2018.2820022
Keywords
Coupled electro-thermal modeling; finite-difference time-domain (FDTD); gas-insulated transmission line (GIL); short-circuits; transients; volume-element-method (VEM)
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Funding
- European Social Fund
- Hellenic Republic
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In this paper, two discretization techniques are combined to present a coupled electro-thermal model for the transient analysis of gas-insulated transmission lines (GILs). The analysis of the thermal problem is based on the volume-element-method, representing heat transfer equations on a 2-D axisymmetric GIL model and determining temperature distribution over space and time. For the electrical formulation, the finite-difference time-domain method is adopted considering constant parameters calculated at the frequency of interest. The coupled electro-thermal problem in the case of transient conditions is solved bymeans of a bidirectional procedure. A set of test cases is imposed on the electric part, and transient analysis is conducted while considering the line coupled electro-thermal performance.
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